Timber alternative windows installed in a Hampshire home
kjm logo

Trading Since 1983 • Which? Trusted Trader • No Sub-Contract Fitters

Andover & Hampshire Home Improvements: Windows, Doors & Conservatories

Posted on Google Google
Ross Cousins profile picture
Ross Cousins
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Having used KJM as our primary glazing supplier, at G and R Cousins Building Services, for well over ten years, I cannot fault their product range or reliability. From standard Profile 22 uPVC or Smarts aluminium window supply to high-end aluminium bifold doors to roof lanterns, they deliver exactly what we need. It makes a massive difference having a local supplier where we can source both our standard and specialist products under one roof.
Posted on Google Google
Joe Newell profile picture
Joe Newell
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Can't rate them highly enough. Answered the phone, booked in a visit when it was easy for me and instead of just looking at the issue, he just went and fixed it. 3 years we've put it off when all this time we should have just phoned KJM. Thanks Mark!
Posted on Google Google
Gareth Jones profile picture
Gareth Jones
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Kerry did a great job. Quick and neat installation & adjusted a door that had slipped slightly. Couldn’t be more pleased.
Posted on Google Google
Mary Stark profile picture
Mary Stark
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
We chose to use KJM to replace all of our windows and doors as we had used them in the past to replace patio doors with great success. We were not disappointed this time around either. From the initial meeting with Charles in the Andover showroom to completion, overseen by Simon, all was excellent. Lester and Zak who were our main fitters worked in a conscientious way; Good communication and attention to detail prevailed. Approachable and friendly, nothing was too much trouble for them. We would have no hesitation in recommending KJM Thank you!
Posted on Google Google
Alexandra Ward profile picture
Alexandra Ward
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
What a great team. Our new triple glazed windows have been fitted and we are very happy. Charlie and Ryan did a wonderful job. Both very friendly and professional and cleaned up after themselves. Only took two days and minimal disruption to ourselves. Thank you KJM for your superb service.
Posted on Google Google
Derek Davis profile picture
Derek Davis
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Appointment made for a faulty locking mechanism to be fixed on a double glazed window. This was fixed within 30 minutes of the engineer arriving. Service was quick and efficient. The only downside to the whole process was that we were given a time of mid-morning and the engineer arrived at 8:55 so a little embarrassing as we were not up thinking of a time of around 10. Having said that the service was excellent.
Posted on Google Google
Mrs Taylor profile picture
Mrs Taylor
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
We were recommended KJM Windows by someone in our neighbourhood who had recently had their windows replaced, and we’re so glad we took their recommendation! From our very first contact with Charles in Sales, he was fantastic at guiding us through the different options and quotes, making the whole process clear and straightforward. Andy and Kerry, who carried out the survey and technical work, were incredibly knowledgeable, thorough and accommodating, taking the time to make sure everything was carefully considered and explained. Emma, the Installation Coordinator, was brilliant from start to finish. She kept us regularly updated, was always quick to respond to any questions, and her excellent communication meant we never had to chase for an update. A huge thank you to Zack, Lester and Shae, who did a fantastic job with the installation. They were friendly, polite and professional throughout, always punctual and incredibly tidy. They were a real pleasure to have at the property, and we couldn’t have asked for a better team. They also deserve a special mention for their excellent choice of radio station! Simon was also fantastic in making sure that any issues were dealt with promptly and efficiently, and that everything was finished to an exceptionally high standard. His attention to detail and commitment to ensuring we were completely happy with the finished result were greatly appreciated. From our very first contact to the completion of the installation, everyone at KJM has been incredibly helpful, informative and professional, without ever making us feel pressured or rushed. Overall, we couldn’t be happier with the experience, the quality of the workmanship and, most importantly, the fantastic team behind it. Everyone we dealt with genuinely went above and beyond to make the whole process straightforward and stress-free. We would have no hesitation in recommending KJM Windows to anyone considering new windows. A truly fantastic company with an excellent team from start to finish.
Verified by Trustindex
Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

£100 Million Installed

Since 1983, we have installed over £100 million worth of home improvements across Hampshire. We are built to last.

25,000+ Installations

Thousands of local homeowners have trusted KJM. We don't just claim to be reliable; the data speaks for itself.

Which? Trusted Trader

We hold a near-perfect 4.9/5 rating and were named "Trusted Trader of the Month" twice (Feb 2024 & Aug 2026) for our high standards.

9.87/10 Checkatrade

Based on 360+ reviews. Our customers rate us 9.92 for Reliability and 9.90 for Tidiness.

4.9/5 Google Reviews

With hundreds of genuine reviews, this consistency proves we deliver quality over decades, not just a lucky streak.

10-Year Warranty

Total peace of mind. All our installations come with a comprehensive, insurance-backed guarantee as standard.



No Pressure Promise

Since 1983, KJM Group has championed a ‘No Pressure Promise’ across Andover and Hampshire. Unlike many competitors, our design team is non-commissioned, meaning we offer honest advice rather than aggressive sales tactics.

We provide detailed, written quotations for you to review in the comfort of your own home at your own pace. There are no ‘sign on the day’ gimmicks or hidden clauses—just transparent pricing and the freedom to get back to us whenever you are ready

Why getting a quotation should not be a hassle

Trusted Home Improvements in Hampshire

Since 1983, KJM Group has been the go-to specialist for high-performance windows, doors, and conservatories across Andover, Winchester, and the wider Hampshire region. Unlike general builders, we focus exclusively on quality fenestration.

We offer a comprehensive range of materials to suit every property style:

  • uPVC Windows: Energy-efficient, A-rated casement and tilt & turn styles.
  • Heritage Timber Alternatives: The Residence Collection (R9) and Roseview Sash windows, approved for many local Conservation Areas.
  • Aluminium Systems: Slimline bi-fold doors and windows for modern extensions.
  • Hardwood & Timber: Sustainable, hand-finished wooden joinery.

Whether you are in Winchester, Basingstoke, Salisbury, or right here in Andover, our employed installation teams (no sub-contractors) ensure a perfect finish every time.

KJM Group employed window fitters installing double glazing in Hampshire

Our Range

The KJM Customer Promise

We don't just fit windows; we deliver a stress-free experience from quote to completion.

No Pressure Sales

We hate "hard sells" as much as you do. Our team are employed staff, not commission-only agents. We provide a detailed written quote and leave you to decide.

Expert Technical Survey

Before we manufacture anything, our senior surveyor visits to take millimetre-perfect measurements, ensuring your new products fit your home seamlessly.

Employed Fitting Teams

We do not use random sub-contractors. Our installers are directly employed, uniformed, and trained by KJM to meet our high standards of workmanship.

Tidy Home Guarantee

We treat your home with respect. Our teams use dust sheets, vacuum up after themselves, and remove all old materials and debris when they leave.

British Made Quality

We champion British manufacturing. Every window and door is custom-made in the UK to your exact specifications, ensuring superior quality.

Dedicated Aftercare

Our relationship doesn't end at installation. We have a dedicated service engineer to handle any adjustments or queries you might have in the future.

Request a Quote

Offering a no hassle, no pressure approach to our quotation, you can request a quote today to view whenever you need it.

GET A QUOTE

Contact Us

If you have any questions about our products or services, contact us today using the contact form, and we will endeavour to assist you as soon as possible.

GET IN TOUCH
Smarts Visoglide Doors
Self Cleaning Glass Lantern Roof
Deceuninck Flush Casement Windows
KJM Home Installation
Composite Front Door
Smarts Aluminium Systems
Aluminium Window and Door Installation
Roseview Sliding Sash Windows

Product Gallery

Our extensive product catalogue covers everything from energy-efficient uPVC and sleek aluminium windows to high-security composite doors and tiled conservatory roof replacements.

At KJM Group, we believe seeing is believing. Choosing the right style for your home can be difficult from a brochure alone. That is why we have curated a gallery of our recent projects across Andover and Hampshire. Explore our installation photography to see the quality of our finish and find the perfect inspiration for your own home improvement project.”

View Our Full Gallery

Our Products

Start Your Free Online Quote

START A QUOTE

Testimonials

 

Check Out A Recent Customer Testimonial



Awards and Accreditations

Frequently Asked Questions

KJM Group has been trading since 1983. With over 40 years of experience serving Andover, Winchester, and the wider Hampshire region, we are one of the area's longest-established home improvement companies. This longevity provides you with security and peace of mind.

We directly employ our own installation teams. Unlike many competitors who rely on sub-contractors, using our own trained staff allows us to maintain strict quality control, ensure reliability, and provide a polite, professional service in your home.

Yes. We are fully accredited. KJM Group is a registered member of FENSA and the Glass & Glazing Federation (GGF). We are also Trustmark approved and a member of the Hampshire County Council "Buy With Confidence" scheme.

Yes, absolutely. We have a fully stocked showroom in Andover (Mylen Business Centre, SP10 3HR). We encourage you to visit us to see and feel the quality of our windows, doors, and conservatory/solid roofs before you commit.

Latest News

Pilkington Launches Optitherm S3 Plus Triple Glazing Glass

Pilkington Launches Optitherm S3 Plus Triple Glazing Glass

READ MORE
Comp Door Launches New 2026 Brochure Featuring ‘Total Black Out’ Frames

Comp Door Launches New 2026 Brochure Featuring ‘Total Black Out’ Frames

📢 Product News & Updates Comp Door has launched its new 52-page 2026 brochure, introducing fresh door designs, updated hardware … Continued

READ MORE
Solidor launch five new doors

Solidor launch five new doors

🚪 Company News & Product Updates Solidor expands its market-leading residential range with five new designs tailored to heritage and … Continued

READ MORE

© 2026 KJM Group Ltd

Cookie Policy Privacy Policy T&C's

Contact Us

Online Quote